From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1A83156C6A for ; Wed, 4 Feb 2026 14:01:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770213704; cv=none; b=kLgGe5vwctI579hIkJmhbm8CzHRZ+HNArAIIfIHrpP9k+qv6tbt3ESYlQQYsYO4RkdVsQSG81+qgzIt5lwuXztE0mGdwKOOa2NYgPqsnE4B9P8YrrZsnZ9yRMMnwaMpyGqw3D0tTuo7+t9OiUwsFP0x9TocOvTU+OJb3+9M4J3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770213704; c=relaxed/simple; bh=emMy13JrIEWGGb4Yj1Obm5OPqROR8LK+7EP9jth9dqs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VTiCvTNVosXVysAnxPIy3sMaRtVJKtUpuLqb+aKo3gTWH9eJ3VS3eZqg52XqY06/152jsMEo65e9lPwtUtweOGq14p5qTI5S2m4zVvOo/V6p45nDZrYbJ0iJfxN8BbbVSuVpqj0bk0m0B26ZflxWzfA1Hu5g/INpDxSsRfW+/0I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=ZiLZOMYR; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=DEjpiicE; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="ZiLZOMYR"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="DEjpiicE" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 614CIVpS096187 for ; Wed, 4 Feb 2026 14:01:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= iS4JnPBI/eXVdO62TuwXvtzIoHIazcuTqGQx24R1EVo=; b=ZiLZOMYRu9h4C6Tb h1jNhopo271rF10/GFM3clK1wupFoWU83A/Fy744Gh7fbDSjMW/KGAMPsmz53Bmy Nz9+sATEiw3LgAgIclcQqFXucWRw+z1936yAcwxccfnQcMSSMbCXvrHCAkOEgdVC 80qbUBPLoYGLu/chJlPYbVQ3FkNFCXRJ8RZBvqyRMxndRxNt6GDmRyQK6a7WK0UI rmKFPMzWuS+PsXwU8hbrG4QBma6FqJGDbhUS5u693dpAyjqS13N8C3OXOqmbAdZW +4FfgpRKiQQeXbftpqosHUbIV+d+d6Uo2p5exwB8cyvJ+dfk5A6j3dMfgfd1wQyi 3wzp8A== Received: from mail-vk1-f197.google.com (mail-vk1-f197.google.com [209.85.221.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4c44kbghft-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Wed, 04 Feb 2026 14:01:42 +0000 (GMT) Received: by mail-vk1-f197.google.com with SMTP id 71dfb90a1353d-5663c707f02so294318e0c.1 for ; Wed, 04 Feb 2026 06:01:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1770213702; x=1770818502; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=iS4JnPBI/eXVdO62TuwXvtzIoHIazcuTqGQx24R1EVo=; b=DEjpiicEWGT//yAP8SRvNI5w1sCp9DydCHosB0Cg3/ovY/eSVbpth+iSoucyFX52q1 1bdpvq0GNlbJ3hwfsl3ea3ZxKQ2dCriZQG/18iVQyGuXpkAF4TcZh6iEWnoPCo/8RfpB gjgdnIr74Mhh3xMLNHpNjCzXSGyV+6NbbdwadTiMjUdGhuqYPydfI6Ro9QBWzd/SZ1MT 7i3K7ZC1x0wf/92BsdTCpuDYGHCAxA1zDWaEB9/6nCW9ZR2itvbYxEfVqPe2Z9SewwTL G8osy1/M3fTpUfwxhAd6wXPvIgBnTOWXdYKMhL2Rh+ydqRvMtGm35o9u8w/9ASJ7Sp3E +sig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770213702; x=1770818502; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=iS4JnPBI/eXVdO62TuwXvtzIoHIazcuTqGQx24R1EVo=; b=g4XR2kjJMq+PdlwXw4EAZeZgOY9LB/DtocvrjLDgeA6uRxMinQFiozQcMLuGf3Syoy Yhn/Lcuc9yPEQS2PzPyRYohx4WRI3Cv44nGorPL7GNzh6N805m9S+Zms70bCLLRJm7lH 210ywOuPo8yjIL7wm2r6KYjDyp/Jrltwpl1kErEPtUG1zKvqD3kg3PGZkSHAhShkUmj9 nUGzXl4Vkx206ZjVYIayFEAigQi3cMj/rJrZfSem9EIbMQu5Ip9Ki0lhPRdxJ26eRvWL XN35btH4o+lhsKwXnmJMgU7kFggxt/widJAeP5pAR57tvU6tDKnS3R7NctolfjgTvYrE 6LXA== X-Forwarded-Encrypted: i=1; AJvYcCVpp7PwFyUYoXQfh2B8c5FdG8nVZW/KnfIe4172JZ6+6LvE9LKHXtukNlI71upMlG686AAIcf3V05SPoFk=@vger.kernel.org X-Gm-Message-State: AOJu0YxFZDrIqG3VQGRrC5LazZ31niW8DfsIULWiVLbKtnYcB3fWOn6F SX2JcvvJGBuLlfZaXfYl6Q5OAGtDfK0jkZr1rpYC5D8au9vRGjrEY0KHjb22ywR+boCyqnw+x99 QqvLW2QwnMQQGpAv1v0h1QkkAxEKEH0lV4wBRMk0K+L3B517IpYyrDLULOzp/m0DSLRI= X-Gm-Gg: AZuq6aIHOSU9WPAK1mk3tE5Nir1uOR5ZA8p93MX5ONpTpGhYljUYN9+myvLHMB/3Bf9 8qM74TjnSuY+C8la8wRtjglezOUcrh++GucRwFMfYeX5ayjOXEPT3Y8LZKt3QcfKEbPPuqTiTuR iBe7kMIRzZieH7NZTxklGT0fnESVxMCHPdvXcxtZqxfoefvByfSiqsXhVQGy4OH1I56Eq6yYYQQ NgkuYvY0k10G9lhPs4FTiAW04t02QTV+LVNljHmU8Jc263TDsImZm/5H/tDfyFC3FxsaojgexTc WpedPnR+gUIWtlsycS0fWb2lLUYbo2Cg8fX8Yc8ufRh72NfVxKG30LrmReD788FOc+MeMT/U+co 01dCXl9n0DNSmH9Igcwhd/G6gRpHRaBJ86Bz160AxsTG9XRdmLOIxVUO8VeHhood+aIY= X-Received: by 2002:a05:6122:1306:b0:55b:1668:8a76 with SMTP id 71dfb90a1353d-566e808afb3mr556367e0c.2.1770213698846; Wed, 04 Feb 2026 06:01:38 -0800 (PST) X-Received: by 2002:a05:6122:1306:b0:55b:1668:8a76 with SMTP id 71dfb90a1353d-566e808afb3mr555907e0c.2.1770213694155; Wed, 04 Feb 2026 06:01:34 -0800 (PST) Received: from [192.168.119.254] (078088045245.garwolin.vectranet.pl. [78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8e9fcd8f17sm128981866b.12.2026.02.04.06.01.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 04 Feb 2026 06:01:33 -0800 (PST) Message-ID: Date: Wed, 4 Feb 2026 15:01:29 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/9] dt-bindings: soc: qcom: eud: Restructure to model multi-path hardware To: Elson Serrao , Greg Kroah-Hartman , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Souradeep Chowdhury Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260126233830.2193816-1-elson.serrao@oss.qualcomm.com> <20260126233830.2193816-2-elson.serrao@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260126233830.2193816-2-elson.serrao@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: wDpVjLdk2mOeSbQHfcodJ1_3l10WjHEk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA0MDEwNiBTYWx0ZWRfXxiQishnmhK/8 6VEyhI/SXJtzW5DX41a90FHxwfIOE3XVzpxIsSGBJbQ79ow49FBJEMfypEzlSviY68dKYsNbO9F MFehfVByjGzHi/oU0JQb6t91r6PNY/O8vodTmi0qBXUorN7LsZUE29Y1hrbk04UhNq6z9luhTTA qyaHbtAeoM7S08oMlKOlPrYSpH0GTYdqvlZxIYzXq6M5y/24bLA9nfUev9RT1abyz9B8h1yFcrG LQ9XE7NzBTWw+AC3SwsIZN274S6k1JWJr01hdEWHUaE0q/ItgfdfIZxWHGmBaJxa+KD3wtiyo9B zNkZJronuVLWS/Ho3TV+53SzG1bR7o39duYEqkcBoIFd750tWXYZlzviJfXIfTffGc85JmUkQin HUIUONwgNQTasSWN5rFZ1rhe3R8h89DQytaAbZsevWd15VCQswavy6nOm1ZgjX4P1Mkbjj5MlgS ZhY9fPsMfzx8+RPsVXw== X-Proofpoint-GUID: wDpVjLdk2mOeSbQHfcodJ1_3l10WjHEk X-Authority-Analysis: v=2.4 cv=HN7O14tv c=1 sm=1 tr=0 ts=69835146 cx=c_pps a=JIY1xp/sjQ9K5JH4t62bdg==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=1VuqB2ABKDwlP82YmI0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=tNoRWFLymzeba-QzToBc:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-04_04,2026-02-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 phishscore=0 clxscore=1015 bulkscore=0 spamscore=0 adultscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602040106 On 1/27/26 12:38 AM, Elson Serrao wrote: > The Qualcomm Embedded USB Debugger (EUD) can intercept one or two > independent High-Speed UTMI paths, depending on the SoC. Each path is > distinct with its own HS-PHY interface, connector/controller wiring, and > UTMI routing behavior. The EUD hardware sits between the USB2 PHY and > the USB controller on each path. > > The existing binding models only a single UTMI path and does not provide > a way to associate the required High-Speed USB PHY. EUD relies on the > HS-PHY on the selected UTMI path for link signalling and correct operation > of the hardware. > > Historically, EUD has worked on platforms that use a single UTMI path > because the USB controller maintains ownership of the PHY during > enumeration and normal operation. This implicit relationship allowed > EUD to function even though the dependency on the PHY was not described > in the binding. However, this behavior is not guaranteed by hardware. > The current binding description is not sufficient for SoCs that expose > two independent UTMI paths, where the PHY association and port wiring > must be explicitly described. > > Introduce per-path eud-path child nodes so each UTMI path can describe > its HS-PHY, port connections, and the role‑switching capability of its > associated USB port. > > Signed-off-by: Elson Serrao > --- [...] > +patternProperties: > + "^eud-path@[0-1]$": At least a since instance of this should be 'required' Konrad